From owner-freebsd-questions@FreeBSD.ORG Wed May 4 22:08:07 2005 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 683AF16A4CE for ; Wed, 4 May 2005 22:08:07 +0000 (GMT) Received: from hobbiton.shire.net (hobbiton.shire.net [166.70.252.250]) by mx1.FreeBSD.org (Postfix) with ESMTP id E1A1B43D6A for ; Wed, 4 May 2005 22:08:06 +0000 (GMT) (envelope-from chad@shire.net) Received: from [67.161.222.227] (helo=[192.168.99.68]) by hobbiton.shire.net with esmtpsa (TLSv1:RC4-SHA:128) (Exim 4.43) id 1DTS0a-000AoW-Qs; Wed, 04 May 2005 16:07:35 -0600 In-Reply-To: <200505041627.58250.algould@datawok.com> References: <200505041522.25722.algould@datawok.com> <42792FC9.3070203@chuckr.org> <200505041627.58250.algould@datawok.com> Mime-Version: 1.0 (Apple Message framework v728) Message-Id: From: "Chad Leigh -- Shire.Net LLC" Date: Wed, 4 May 2005 16:06:19 -0600 To: Andrew L.Gould X-Mailer: Apple Mail (2.728) X-SA-Exim-Connect-IP: 67.161.222.227 X-SA-Exim-Mail-From: chad@shire.net Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 3.0.0 (2004-09-13) on hobbiton.shire.net X-Spam-Status: No, score=-0.1 required=5.0 tests=AWL,BAYES_50 autolearn=disabled version=3.0.0 X-Spam-Level: X-SA-Exim-Version: 4.1+cvs (built Mon, 23 Aug 2004 08:44:05 -0700) X-SA-Exim-Scanned: Yes (on hobbiton.shire.net) cc: Chuck Robey cc: questions@freebsd.org Subject: Re: mixing IDE and SATA hard drives on a FreeBSD system X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 May 2005 22:08:07 -0000 On May 4, 2005, at 3:27 PM, Andrew L. Gould wrote: > On Wednesday 04 May 2005 03:25 pm, Chuck Robey wrote: > >> Andrew L. Gould wrote: >> >>> My AMD K6-2 computer is in the shop getting upgraded to AMD64. If >>> FreeBSD 5.4 is released next week, the timing couldn't be better. >>> >>> I was thinking about putting FreeBSD and swap on the ATA100 IDE >>> hard drive and installing a SATA hard drive for home and database >>> data. Is there any reason I shouldn't mix hard drive types? (I've >>> never messed with SATA before.) >>> >> >> YMMV, but for myself, I notice that SATA is notably less reliable >> than straight SCSI drives are. Less than Ide also. I don't know >> why. >> >> >>> Thanks, >>> >>> Andrew >>> > > Thanks for the warning. I just did a google search on "sata > reliability" with lots of interesting results. The expected lifespan > (MTBF) of a sata is lower than the scsi; but I haven't found any > comparisons to ide yet. > they should be the same as IDE as almost all the SATA drives use the same mechanisms as their comparable IDE brethren. SATA is just the interface. SCSI drives are different in that the market for the SCSI interface also demands a different mechanism. They could, if they wanted to (and used to) add SCSI interfaces to the same mechanisms as the IDE mechanisms and you'd have a lower SCSI MTBF Chad